Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(S) from the statements.

Statements :

All red are yellow.

All yellow are brown.

Conclusions:

I. Some yellow are red.

II. Some brown are red.

III. Some red are not brown.

IV. All brown are yellow.